200 APPENDIX III. 



Forty-four hours. Scrapings of the unvarnished 

 nails on the hands and feet showed lithium dis- 

 tinctly. The further the scraping was carried the 

 less lithium was found. The scrapings of the 

 varnished nail of the hand shows only traces of 

 lithium. The varnished nail of the foot has no 

 lithium. A small particle of the skin from the 

 hand or foot shows lithium distinctly. Perspiration 

 shows lithium distinctly. The hair of the head or 

 whiskers shows no lithium. 



Third day. Nails the same as yesterday. The 

 unvarnished nails show lithium; the varnished, 

 none. Urine shows lithium most distinctly. 



Fourth day. Urine shows lithium in one drop. 



Fifth day. Urine still shows minute traces of 

 lithium in one drop. 



Sixth day. Urine shows no lithium. Ash of the 

 urine shows faint traces of lithium. 



Seventh day. Ash of urine shows no lithium. 

 Alcoholic extract shows traces. 



Eighth day. Alcoholic extract from one ounce of 

 urine still shows traces of lithium. 



Ninth day. Alcoholic extract from one ounce of 

 urine shows no lithium. 



Experiment 5. A boy, aged sixteen years, took 

 five grains of chloride of lithium, and the urine was 

 passed every second minute. Half an hour pre- 

 viously he had eaten some bread and butter. No 

 lithium could be detected in the urine previous to 

 the taking of the dose. 



Second minute, no lithium in the urine. 



Fifth minute, none. 



